The characteristics of high air pressure DTH Button Bit: 1.Deliver maximum energy to drilling bit, fast drilling speed and low air consumption due to inner structure of HD series DTH hammer designed according to newest rock drilling theory. 2.Smooth ...

... it meets any stringing pipe requirement. Even if installed,plastic pipe can rotate at random. Release ring adopts ellipse design,so removing for it is more convenient. All taper pipethreads paints Teflon leakage...

The characteristics of high air pressure DTH Button Bit: 1.Deliver maximum energy to drilling bit, fast drilling speed and low air consumption due to inner structure of HD series DTH hammer designed according to newest rock drilling theory. 2.Smooth ...